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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <button id="btn">设置</button>
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        // document.querySelector('#btn').onclick = function() {
        //     location.href = 'http://www.baidu.com'
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        // 
        console.log(location.search)
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